Wednesday: Science Lab: Electricity at Sahuarita Library, 725 W. Via Rancho Sahuarita. Kids ages six and up can learn how an electric circuit works and how to make an electro-magnet using an iron nail and a battery. It's at 3 p.m. Free.

Thursday: Park Place Kids Club at the food court of Park Place Mall, 5870 E. Broadway. Storybook character hour presented by the A-Store and U of A Bookstore. Kids can create a craft and listen to a storybook reading with Maya and Miguel. 10:30 a.m. Free.

Friday: Monster Mash at Wheeler Taft Abbett Sr. Library, 7800 N. Schisler Drive. Scary snacks and costume contest. There will also be games and crafts. Costumes encouraged, but not required. For kids ages 12 to 19. Runs from 5:30 to 7:30 p.m. Free. 594-5200.

Sunday: Third Annual Tucson Pumpkin Toss, University of Arizona Mall, 1607 E. University Blvd. Watch more than a dozen teams from high schools, colleges or non-academic organizations compete to catapult a four pound pumpkin the length of the UA mall. 9 a.m. to 4 p.m. Free.